Mission vs Guerrero: Flour vs Corn Tortilla, Graded
The corn-versus-flour question, settled with numbers. A standard refined white-flour tortilla against a plain white corn tortilla — and the gap is bigger than most people expect, driven almost entirely by sodium and ingredient simplicity. Every number below is pulled live from each product's graded fact sheet.
One note on reading the table: the two brands label different serving sizes — Mission lists one 49g tortilla, Guerrero lists two smaller 47g tortillas. The per-serving rows reflect each label as printed; the per-100g rows normalize both to the same weight so the comparison is apples-to-apples.
The short answer
Guerrero White Corn Tortillas are the clear winner on nutrition. Three real ingredients (corn, lime, water plus freshness agents), almost no sodium (20.2mg per 47g serving), zero saturated fat, naturally gluten-free, and more fiber. That earns a B+ (81/100) — the cleanest tortilla we grade. If nutrition is the priority, this is the pick.
Mission Soft Taco Flour Tortillas are the everyday foldable default — enriched bleached flour, shortening, and 400mg of sodium in a single tortilla, with barely any fiber (0.98g). Graded as a nutrition product, that lands at C+ (66/100). Where it genuinely wins is the kitchen: it's big, soft, and folds around a burrito without cracking — something a corn tortilla simply can't do.
The 15-point gap comes down to two dimensions. Corn carries a perfect A+ on sodium versus the flour tortilla's F, and a C on fiber versus D. Mission claws a little back with marginally higher protein and a slightly better ingredient-quality mark — but it can't outrun the salt. Pick flour for the format, corn for the label.
Side-by-side
| Mission Soft Taco Flour | Guerrero White Corn | |
|---|---|---|
| Labelgrade | C+ 66 / 100 | B+ 81 / 100 |
| Label serving | 1 tortilla (49 g) | 2 tortillas (47 g) |
| Calories per serving | 140 | 100 |
| Protein per serving | 4 g | 2 g |
| Sodium per serving | 400 mg | 20.2 mg |
| Sodium per 100 g | 816.3 mg | 43 mg |
| Fiber per serving | 0.98 g | 2.02 g |
| Fiber per 100 g | 2 g | 4.3 g |
| Saturated fat per serving | 1 g | 0 g |
| Total sugar | 1 g | 2 g |
| Grain | Enriched bleached wheat flour | Corn masa (naturally GF) |
| Fat source | Hydrogenated soybean shortening | None added |
| Best for | Burritos, quesadillas, wraps | Tacos, lowest-sodium meals |
| Protein density grade | C | C- |
| Ingredient quality grade | B- | B |
| Sodium grade | F | A+ |
| Saturated fat grade | A- | A+ |
| Sugar grade | A+ | A+ |
| Fiber grade | D | C |
Where Guerrero corn wins
- Sodium — the decisive number. Normalized to 100g, corn is ~43mg versus the flour tortilla's ~816.3mg, roughly 19x less salt. In plain terms, one Mission tortilla carries 400mg (about 17% of the daily limit); two Guerrero corn tortillas carry 20.2mg. Corn grades a perfect A+ (100/100); the flour tortilla an F (24/100).
- More fiber. 2.02g per serving vs Mission's 0.98g — corn keeps more of the grain intact, where refined bleached flour strips it out. That's a C versus a D.
- Zero saturated fat. 0g — a perfect A+ — because nothing is added. The flour tortilla relies on hydrogenated soybean shortening.
- Naturally gluten-free. Built from corn, not wheat, so there's no gluten to begin with — the default taco shell for anyone with celiac or a wheat sensitivity.
- Lower calories. 100 calories for two small tortillas vs 140 for a single soft-taco-size flour round.
Where Mission flour wins
- Foldability — the thing corn can't do. Mission tortillas are large, soft, and elastic. They wrap a fat burrito without cracking, griddle into a clean quesadilla, and roll into wraps that hold together. A small corn tortilla splits if you overstuff it. For burritos and quesadillas, flour is simply the right tool.
- More protein per serving. 4g vs Guerrero's 2g. Both grade low (C vs C-) — neither is a protein food — but the flour tortilla has the edge.
- A slightly better ingredient-quality mark. B- (70/100) versus corn's B (77/100) — close, and the only dimension besides protein where the flour tortilla leads.
Where it's a tie
- Sugar. 1g (Mission) vs 2g (Guerrero) — both grade A+. Tortillas aren't a sugar concern.
- Both are carbohydrate wrappers. Neither is a protein source; both exist to hold a filling. The job of the tortilla is to carry beans, chicken, or carnitas — not to add nutrition itself.
Which should you buy
Buy Guerrero White Corn if you can use a corn tortilla for the meal — tacos, enchiladas, anything where a small round works. It's the cleaner label, the lower-sodium choice by a wide margin, naturally gluten-free, and the higher grade. If you eat tortillas a few times a week and watch sodium, switching to corn is one of the bigger easy wins in this aisle.
Buy Mission Soft Taco Flour if the format demands it — burritos, quesadillas, and big wraps where you need a soft, foldable round that won't crack. The grade isn't an argument against those meals; it's a reminder that the wrapper isn't "free." At 400mg of sodium per tortilla, count it as part of the meal, especially once you add a salted filling like cheese or deli meat.
The honest framing: this isn't really "which brand is better" — it's "match the tortilla to the job." Corn is the better-graded everyday default; flour is the specialist for foldable formats. If you want a flour-style wrap with corn-like nutrition, a high-fiber low-carb wrap is a third lane worth a look. See the full tortillas report card for where every tortilla we grade lands.
How they were graded
Both products use the v3 6-dimension Labelgrade formula (see /methodology): protein density 23% + ingredient quality 21% + saturated fat 18% + sodium 15% + sugar 15% + fiber 8%. Mission data from USDA FDC 1955227; Guerrero data from USDA FDC 2596984. Every figure on this page is read live from each product's record at build time, so the numbers can't drift out of sync with the individual fact sheets.
Frequently Asked Questions
Corn or flour tortilla — which is healthier?
For most people, corn — and this matchup shows why. Guerrero White Corn Tortillas are corn masa flour, water, and a couple of freshness agents, carrying just 20.2mg of sodium per 47g serving (~43mg per 100g), 0g saturated fat, and 2.02g fiber. Mission Soft Taco Flour Tortillas use enriched bleached flour and shortening, carry 400mg of sodium per tortilla (~816.3mg per 100g), and only 0.98g of fiber. Corn grades B+ (81/100); the refined-flour tortilla grades C+ (66/100). Flour wins on foldability for burritos, not on nutrition.
Which tortilla has less sodium — Mission flour or Guerrero corn?
Guerrero corn, dramatically. Normalizing to 100g (the labels use different serving sizes), Guerrero is ~43mg of sodium per 100g versus Mission's ~816.3mg — roughly 19x more sodium in the flour tortilla. In everyday terms, one Mission Soft Taco tortilla carries 400mg (about 17% of the daily limit) while two Guerrero corn tortillas carry just 20.2mg. Sodium is the single biggest reason the grades diverge: corn earns a perfect A+ (100/100), the flour tortilla an F (24/100).
Is Guerrero corn gluten-free and Mission flour not?
Yes. Guerrero White Corn Tortillas are built from corn, not wheat, so they're naturally gluten-free — the grain never had gluten to begin with. Mission Soft Taco Flour Tortillas are made from enriched bleached wheat flour and contain gluten. For anyone with celiac disease or a wheat sensitivity, that's the practical reason corn is the default taco shell. (As always, check the package for a certified-gluten-free seal if facility cross-contamination is a concern.)
Does Mission flour beat Guerrero corn on anything?
Yes — practicality, and a couple of macros. Mission flour tortillas are larger, softer, and more elastic, so they fold around a burrito or griddle into a quesadilla without cracking; a small corn tortilla can't. On the label, Mission also carries more protein (4g vs 2g per serving, though both grade low) and its ingredient quality actually scores a hair higher (B- vs B). Where it loses badly is sodium and fiber. So pick flour for the format, corn for the nutrition.
How do the Labelgrade scores compare?
Guerrero White Corn scores B+ (81/100); Mission Soft Taco Flour scores C+ (66/100) on the same v3 6-dimension formula — a 15-point gap. Corn wins on the two dimensions that matter most here: sodium (A+ vs F) and fiber (C vs D), plus a perfect A+ on saturated fat. Mission counters with marginally higher protein and a slightly better ingredient-quality mark, but it can't overcome 400mg of sodium per tortilla. Both are carbohydrate wrappers, not protein foods.